/Engine/Source/Editor/Persona/Public/AnimationEditorViewportClient.h
class FAnimationViewportClient : public [FEditorViewportClient](API\Editor\UnrealEd\FEditorViewportClient), public [TSharedFromThis< FAnimationViewportClient >](API\Runtime\Core\Templates\TSharedFromThis)
UPersonaOptions...
ConfigOption
Persona config options
FOnGetBoneSize
OnGetBoneSize
FOnBoneSizeSet
OnSetBoneSize
Allow client code to store/serialize bone size if desired